Subcutaneous or Submucosal abscessAbscess developed, under the skin or under mucosal abscess anal canal subepithelium or under rectum mucosal. There are the one which anal fissure or internal hemorrhoid is infected case, or the one originated by trauma such as blocked blood vessel or foreign object.

Is every abscess is fistula?

Fistulas are associated with drainage of blood, pus, or mucus, but they are generally not painful. Does an abscess always become a fistula? No. A fistula develops in up to 50 percent of all abscess cases.

How can you tell the difference between perianal abscess and fistula?

An anal abscess is an infected cavity filled with pus near the anus or rectum. An anal fistula (also called fistula-in-ano) is a small tunnel that tracks from an opening inside the anal canal to an outside opening in the skin near the anus.